ABC News' Z. Byron Wolf reports: Ron Paul is not holding his breath for a speaking slot at the Republican National Convention in Minneapolis/St. Paul in September and he has long planned a day-long shadow convention to give him an arena to expound his limited government mantra.

But, worried about the size of his arena, his new political action group--The Campaign for Liberty--has booked a bigger one.

They'll announce today they've changed from the Williams Arena at the University of Minnesota to the much larger Target Center, seating capacity: 18,000.